Removed extra newlines from beginning of Java classes (#264)

src/main/java/edu/wpi/first/networktables/PersistentException.java

@@ -14,7 +14,6 @@ import java.io.IOException;
  * 
  */
 public final class PersistentException extends IOException {
-
   public static final long serialVersionUID = 0;
 
   /**

src/test/java/edu/wpi/first/networktables/ConnectionListenerTest.java

@@ -5,7 +5,6 @@ import java.util.List;
 import junit.framework.TestCase;
 
 public class ConnectionListenerTest extends TestCase {
-
   NetworkTableInstance serverInst;
   NetworkTableInstance clientInst;
 

src/test/java/edu/wpi/first/networktables/EntryListenerTest.java

@@ -5,7 +5,6 @@ import java.util.List;
 import junit.framework.TestCase;
 
 public class EntryListenerTest extends TestCase {
-
   NetworkTableInstance serverInst;
   NetworkTableInstance clientInst;
 

src/test/java/edu/wpi/first/networktables/LoggerTest.java

@@ -5,7 +5,6 @@ import java.util.List;
 import junit.framework.TestCase;
 
 public class LoggerTest extends TestCase {
-
   NetworkTableInstance clientInst;
 
   @Override

src/test/java/edu/wpi/first/networktables/NetworkTableTest.java

@@ -5,7 +5,6 @@ import java.util.List;
 import junit.framework.TestCase;
 
 public class NetworkTableTest extends TestCase {
-
   public void testBasenameKey() {
     assertEquals("simple", NetworkTable.basenameKey("simple"));
     assertEquals("simple", NetworkTable.basenameKey("one/two/many/simple"));